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In order to develop a selective membrane separation process for flavonoids, i.e. baicalin, baicalein and flavone extracted from a crude drug, Wogon , we have measured the permeabilities of these flavonoids through a polyvinyl alcohol membrane, together with their aqueous solubilities. The aqueous solubilities of baicalin and baicalein increase with increasing aqueous solution pH due to the acid...
5,8-diethyl-7-hydroxydodecane-6-oxime (LIX 63), a commercially available reagent, has been used in this work to investigate the extraction of molybdenum(VI) and vanadium(IV) from sulfuric acid solution in the presence of various other metals, such as aluminum(III), cobalt(II), nickel(II) and iron(III). Molybdenum(VI) and vanadium(IV) were extracted preferentially and separated completely from the...
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